Paint Job Estimator

import java.util.Scanner;

public class Main {

    private static final int WALL_SPACE_SQFT = 115;
    private static final int GALLONS_OF_PAINT = 1;
    private static final int HOURS_OF_LABOR = 8;
    private static final double CHARGES_PER_HOUR = 18.00;

    public static void main(String[] args)
    {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter number of rooms");
        int rooms = scanner.nextInt();

        double [] roomWallSpaces = new double[rooms];

        System.out.println("Enter wall space SQF per room");
        for (int i = 0; i < roomWallSpaces.length; i++)
        {
            roomWallSpaces[i] = scanner.nextDouble();
        }

        System.out.println("Enter price per gallon of paint");
        double pricePerGallon = scanner.nextDouble();

        System.out.println("Number of gallons of paint required: " + getGallonsRequired(roomWallSpaces));
        System.out.println("Number of hours of labor required: " + getHoursOfLaborRequired(roomWallSpaces));
        System.out.println("The cost of paint required: " + getTotalCostOfPaint(roomWallSpaces, pricePerGallon));
        System.out.println("Total labor charges: " + getTotalLaborCharges(roomWallSpaces));
        System.out.println("Total cost of the paint job: " + getTotalCostOfPaint(roomWallSpaces, pricePerGallon));
    }

    public static double getOverallRoomWallSpaces(double[] roomWallSpaces)
    {
        double overallRoomWallSpaces = 0;

        for (double roomWallSpace : roomWallSpaces) {
            overallRoomWallSpaces += roomWallSpace;
        }

        return overallRoomWallSpaces;
    }

    public static double getGallonsRequired(double[] roomWallSpaces)
    {
        return  getOverallRoomWallSpaces(roomWallSpaces) / WALL_SPACE_SQFT * GALLONS_OF_PAINT;
    }

    public static double getHoursOfLaborRequired(double[] roomWallSpaces)
    {
        return getOverallRoomWallSpaces(roomWallSpaces) / WALL_SPACE_SQFT * HOURS_OF_LABOR;
    }

    public static double getTotalCostOfPaint(double[] roomWallSpaces, double pricePerGallon)
    {
        return getGallonsRequired(roomWallSpaces) * pricePerGallon;
    }

    public static double getTotalLaborCharges(double[] roomWallSpaces)
    {
        return getHoursOfLaborRequired(roomWallSpaces) * HOURS_OF_LABOR;
    }

    public static double getTotalCharges(double[] roomWallSpaces, double pricePerGallon)
    {
        return getTotalCostOfPaint(roomWallSpaces, pricePerGallon) + getTotalLaborCharges(roomWallSpaces);
    }
}